US10107941B2 - Optical product, and spectacle lens and spectacles - Google Patents
Optical product, and spectacle lens and spectacles Download PDFInfo
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- US10107941B2 US10107941B2 US15/194,970 US201615194970A US10107941B2 US 10107941 B2 US10107941 B2 US 10107941B2 US 201615194970 A US201615194970 A US 201615194970A US 10107941 B2 US10107941 B2 US 10107941B2
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- 230000003287 optical effect Effects 0.000 title claims abstract description 48
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 claims abstract description 71
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 46
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 21
- 229910052681 coesite Inorganic materials 0.000 claims abstract description 16
- 229910052906 cristobalite Inorganic materials 0.000 claims abstract description 16
- 229910052682 stishovite Inorganic materials 0.000 claims abstract description 16
- 229910052905 tridymite Inorganic materials 0.000 claims abstract description 16
- 230000003667 anti-reflective effect Effects 0.000 abstract description 15
- 239000000463 material Substances 0.000 abstract description 15
- 230000015572 biosynthetic process Effects 0.000 abstract description 9
- 235000012239 silicon dioxide Nutrition 0.000 abstract description 4
- 230000000052 comparative effect Effects 0.000 description 34
- 239000011248 coating agent Substances 0.000 description 18
- 238000000576 coating method Methods 0.000 description 18
- 238000012360 testing method Methods 0.000 description 14
- 239000011347 resin Substances 0.000 description 13
- 229920005989 resin Polymers 0.000 description 13
- 239000000243 solution Substances 0.000 description 9
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 7
- 238000009826 distribution Methods 0.000 description 7
- 230000003595 spectral effect Effects 0.000 description 5
- 238000002834 transmittance Methods 0.000 description 5
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 229910052809 inorganic oxide Inorganic materials 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 125000005375 organosiloxane group Chemical group 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 229910052814 silicon oxide Inorganic materials 0.000 description 4
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- 238000013459 approach Methods 0.000 description 3
- 239000003054 catalyst Substances 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 239000011259 mixed solution Substances 0.000 description 3
- 150000003553 thiiranes Chemical class 0.000 description 3
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 3
- 239000004925 Acrylic resin Substances 0.000 description 2
- 229920000178 Acrylic resin Polymers 0.000 description 2
- BOTDANWDWHJENH-UHFFFAOYSA-N Tetraethyl orthosilicate Chemical compound CCO[Si](OCC)(OCC)OCC BOTDANWDWHJENH-UHFFFAOYSA-N 0.000 description 2
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 2
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 2
- YRKCREAYFQTBPV-UHFFFAOYSA-N acetylacetone Chemical compound CC(=O)CC(C)=O YRKCREAYFQTBPV-UHFFFAOYSA-N 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 2
- 230000003301 hydrolyzing effect Effects 0.000 description 2
- MRELNEQAGSRDBK-UHFFFAOYSA-N lanthanum(3+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[La+3].[La+3] MRELNEQAGSRDBK-UHFFFAOYSA-N 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- BPSIOYPQMFLKFR-UHFFFAOYSA-N trimethoxy-[3-(oxiran-2-ylmethoxy)propyl]silane Chemical compound CO[Si](OC)(OC)CCCOCC1CO1 BPSIOYPQMFLKFR-UHFFFAOYSA-N 0.000 description 2
- 238000001771 vacuum deposition Methods 0.000 description 2
- JHQVCQDWGSXTFE-UHFFFAOYSA-N 2-(2-prop-2-enoxycarbonyloxyethoxy)ethyl prop-2-enyl carbonate Chemical compound C=CCOC(=O)OCCOCCOC(=O)OCC=C JHQVCQDWGSXTFE-UHFFFAOYSA-N 0.000 description 1
- FRWYFWZENXDZMU-UHFFFAOYSA-N 2-iodoquinoline Chemical compound C1=CC=CC2=NC(I)=CC=C21 FRWYFWZENXDZMU-UHFFFAOYSA-N 0.000 description 1
- KCXVZYZYPLLWCC-UHFFFAOYSA-N EDTA Chemical compound OC(=O)CN(CC(O)=O)CCN(CC(O)=O)CC(O)=O KCXVZYZYPLLWCC-UHFFFAOYSA-N 0.000 description 1
- 239000004695 Polyether sulfone Substances 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 238000012644 addition polymerization Methods 0.000 description 1
- 230000003373 anti-fouling effect Effects 0.000 description 1
- 229910000410 antimony oxide Inorganic materials 0.000 description 1
- LTPBRCUWZOMYOC-UHFFFAOYSA-N beryllium oxide Inorganic materials O=[Be] LTPBRCUWZOMYOC-UHFFFAOYSA-N 0.000 description 1
- 229910000420 cerium oxide Inorganic materials 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 238000004040 coloring Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- OTARVPUIYXHRRB-UHFFFAOYSA-N diethoxy-methyl-[3-(oxiran-2-ylmethoxy)propyl]silane Chemical compound CCO[Si](C)(OCC)CCCOCC1CO1 OTARVPUIYXHRRB-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 229910052746 lanthanum Inorganic materials 0.000 description 1
- FZLIPJUXYLNCLC-UHFFFAOYSA-N lanthanum atom Chemical compound [La] FZLIPJUXYLNCLC-UHFFFAOYSA-N 0.000 description 1
- 239000000113 methacrylic resin Substances 0.000 description 1
- BFXIKLCIZHOAAZ-UHFFFAOYSA-N methyltrimethoxysilane Chemical compound CO[Si](C)(OC)OC BFXIKLCIZHOAAZ-UHFFFAOYSA-N 0.000 description 1
- 229910000484 niobium oxide Inorganic materials 0.000 description 1
- URLJKFSTXLNXLG-UHFFFAOYSA-N niobium(5+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[Nb+5].[Nb+5] URLJKFSTXLNXLG-UHFFFAOYSA-N 0.000 description 1
- QGLKJKCYBOYXKC-UHFFFAOYSA-N nonaoxidotritungsten Chemical compound O=[W]1(=O)O[W](=O)(=O)O[W](=O)(=O)O1 QGLKJKCYBOYXKC-UHFFFAOYSA-N 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- BMMGVYCKOGBVEV-UHFFFAOYSA-N oxo(oxoceriooxy)cerium Chemical compound [Ce]=O.O=[Ce]=O BMMGVYCKOGBVEV-UHFFFAOYSA-N 0.000 description 1
- VTRUBDSFZJNXHI-UHFFFAOYSA-N oxoantimony Chemical compound [Sb]=O VTRUBDSFZJNXHI-UHFFFAOYSA-N 0.000 description 1
- BPUBBGLMJRNUCC-UHFFFAOYSA-N oxygen(2-);tantalum(5+) Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[Ta+5].[Ta+5] BPUBBGLMJRNUCC-UHFFFAOYSA-N 0.000 description 1
- -1 poly(4-methylpentene-1) Polymers 0.000 description 1
- 229920005668 polycarbonate resin Polymers 0.000 description 1
- 239000004431 polycarbonate resin Substances 0.000 description 1
- 229920001225 polyester resin Polymers 0.000 description 1
- 239000004645 polyester resin Substances 0.000 description 1
- 229920006393 polyether sulfone Polymers 0.000 description 1
- 229920000306 polymethylpentene Polymers 0.000 description 1
- 229920005862 polyol Polymers 0.000 description 1
- 150000003077 polyols Chemical class 0.000 description 1
- 229920006295 polythiol Polymers 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 229920005749 polyurethane resin Polymers 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000002940 repellent Effects 0.000 description 1
- 239000005871 repellent Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000004528 spin coating Methods 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 229910001936 tantalum oxide Inorganic materials 0.000 description 1
- XOLBLPGZBRYERU-UHFFFAOYSA-N tin dioxide Chemical compound O=[Sn]=O XOLBLPGZBRYERU-UHFFFAOYSA-N 0.000 description 1
- 229910001887 tin oxide Inorganic materials 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- JXUKBNICSRJFAP-UHFFFAOYSA-N triethoxy-[3-(oxiran-2-ylmethoxy)propyl]silane Chemical compound CCO[Si](OCC)(OCC)CCCOCC1CO1 JXUKBNICSRJFAP-UHFFFAOYSA-N 0.000 description 1
- 229910001930 tungsten oxide Inorganic materials 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
- 229910052845 zircon Inorganic materials 0.000 description 1
- 229910001928 zirconium oxide Inorganic materials 0.000 description 1
- GFQYVLUOOAAOGM-UHFFFAOYSA-N zirconium(iv) silicate Chemical compound [Zr+4].[O-][Si]([O-])([O-])[O-] GFQYVLUOOAAOGM-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
- G02B1/10—Optical coatings produced by application to, or surface treatment of, optical elements
- G02B1/11—Anti-reflection coatings
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
- G02B1/10—Optical coatings produced by application to, or surface treatment of, optical elements
- G02B1/11—Anti-reflection coatings
- G02B1/113—Anti-reflection coatings using inorganic layer materials only
- G02B1/115—Multilayers
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
- G02B1/10—Optical coatings produced by application to, or surface treatment of, optical elements
- G02B1/14—Protective coatings, e.g. hard coatings
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/20—Filters
- G02B5/28—Interference filters
- G02B5/281—Interference filters designed for the infrared light
- G02B5/282—Interference filters designed for the infrared light reflecting for infrared and transparent for visible light, e.g. heat reflectors, laser protection
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/20—Filters
- G02B5/28—Interference filters
- G02B5/285—Interference filters comprising deposited thin solid films
-
- G—PHYSICS
- G02—OPTICS
- G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
- G02C7/00—Optical parts
- G02C7/02—Lenses; Lens systems ; Methods of designing lenses
-
- G—PHYSICS
- G02—OPTICS
- G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
- G02C7/00—Optical parts
- G02C7/02—Lenses; Lens systems ; Methods of designing lenses
- G02C7/022—Ophthalmic lenses having special refractive features achieved by special materials or material structures
-
- G—PHYSICS
- G02—OPTICS
- G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
- G02C7/00—Optical parts
- G02C7/10—Filters, e.g. for facilitating adaptation of the eyes to the dark; Sunglasses
-
- G—PHYSICS
- G02—OPTICS
- G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
- G02C7/00—Optical parts
- G02C7/10—Filters, e.g. for facilitating adaptation of the eyes to the dark; Sunglasses
- G02C7/104—Filters, e.g. for facilitating adaptation of the eyes to the dark; Sunglasses having spectral characteristics for purposes other than sun-protection
-
- G—PHYSICS
- G02—OPTICS
- G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
- G02C2202/00—Generic optical aspects applicable to one or more of the subgroups of G02C7/00
- G02C2202/16—Laminated or compound lenses
Definitions
- the present invention relates to optical products such as spectacle lenses (including sunglass lenses), and spectacles (including sunglasses) that use the spectacle lenses.
- the spectacle lens disclosed in JP 2006-276123 A includes antireflection films on an object-side surface and an eyeball-side surface of a lens base.
- the antireflection film contains at least one of silicon oxide, titanium oxide, lanthanum titanate, tantalum oxide, and niobium oxide, whereby the object-side antireflection film is caused to have a compressive stress, and the eyeball-side antireflection film is caused to have a compressive stress less than that of the object-side antireflection film or to have a tensile stress.
- an antireflection film is formed of a combination of ternary materials, i.e., silicon oxide, a sintered mixture of titanium oxide, lanthanum oxide, and titanium, and a material having a refractive index higher than that of silicon oxide, thereby providing heat resistance performance.
- ternary materials i.e., silicon oxide, a sintered mixture of titanium oxide, lanthanum oxide, and titanium, and a material having a refractive index higher than that of silicon oxide, thereby providing heat resistance performance.
- the antireflection film should be formed so that silicon oxide or the like has a predetermined compressive stress or tensile stress. Therefore, the film structure for providing sufficient heat resistance while having antireflective performance is complicated, resulting in high costs.
- the present invention has an object to provide an optical product, a spectacle lens, and spectacles, which have antireflective performance, require less number of types of materials for film formation, have a simple film structure which makes film formation easy and reduces costs, and have sufficient heat resistance.
- a first aspect of the invention provides an optical product in which (A) an optical multilayer film having a five-layer structure in which SiO 2 and ZrO 2 are alternately layered is provided on one or both of surfaces of a base, and (B-1) with a layer closest to the base being a first layer, a quotient obtained by dividing a physical thickness of a fourth layer that is ZrO 2 by a physical thickness of a second layer that is ZrO 2 is greater than or equal to 1 and not greater than 4.
- a second aspect of the invention provides an optical product in which (A) an optical multilayer film having a five-layer structure in which SiO 2 and ZrO 2 are alternately layered is provided on one or both of surfaces of a base, and (B-2) with a layer closest to the base being a first layer, a quotient obtained by dividing a physical thickness of a fourth layer that is ZrO 2 by a physical thickness of a second layer that is ZrO 2 is greater than or equal to 1 and not greater than 3.
- a third aspect of the invention provides an optical product in which (A) an optical multilayer film having a five-layer structure in which SiO 2 and ZrO 2 are alternately layered is provided on one or both of surfaces of a base, and (B-3) with a layer closest to the base being a first layer, a quotient obtained by dividing a physical thickness of a fourth layer that is ZrO 2 by a physical thickness of a second layer that is ZrO 2 is greater than or equal to 1 and not greater than 2.
- a fourth aspect of the invention provides an optical product in which (A) an optical multilayer film having a five-layer structure in which SiO 2 and ZrO 2 are alternately layered is provided on one or both of surfaces of a base, and (B-4) with a layer closest to the base being a first layer, a quotient obtained by dividing a physical thickness of a fourth layer that is ZrO 2 by a physical thickness of a second layer that is ZrO 2 is greater than or equal to 1 and not greater than 1.5.
- a fifth aspect of the invention provides a spectacle lens using the optical product according to the above-described invention.
- a sixth aspect of the invention provides spectacles using the spectacle lens according to the above-described invention.
- the present invention exerts an effect of providing an optical product, a spectacle lens, and spectacles which require less number of types of materials for film formation, have a simple film structure which makes film formation easy and reduces costs, and have both antireflective properties and heat resistance.
- FIG. 1 shows a graph representing a spectral reflectance distribution in a visible region according to Examples 1 to 5 and Comparative Example 6.
- FIG. 2 shows a graph representing a spectral reflectance distribution in a visible region according to Comparative Examples 1 to 5.
- a spectacle lens according to the present invention has an optical multilayer film on one surface or both surfaces of a base.
- the base may be made of any material, and is preferably translucent.
- the material (base material) of the base include a polyurethane resin, a thiourethane resin, an episulfide resin, a polycarbonate resin, a polyester resin, an acrylic resin, a polyether sulfone resin, a poly(4-methylpentene-1) resin, and a diethylene glycol bis(allyl carbonate) resin.
- the material include, as a preferable material (for, in particular, a spectacle lens) having a high refractive index, an episulfide resin obtained by addition-polymerization of an episulfide group with polythiol and/or a sulfur-containing polyol.
- the optical multilayer film satisfies the following conditions.
- both of the films preferably satisfy the following conditions, and more preferably have the same layered structure.
- the optical multilayer film has a five-layer structure in which low refractive index layers and high refractive index layers are alternately layered.
- a nearest layer to the base is a first layer
- odd-numbered layers are the low refractive index layers
- even-numbered layers are high refractive index layers.
- the low refractive index layers are formed by using silica (silicon dioxide, SiO 2 ), and the high refractive index layers are formed by using zirconia (zirconium dioxide, ZrO 2 ).
- a quotient obtained by dividing the physical thickness of the fourth layer (high refractive index layer) by the physical thickness of the second layer (high refractive index layer) is greater than or equal to 1 and not greater than 4.
- This quotient (solution of division) is preferably greater than or equal to 1 and not greater than 3, more preferably greater than or equal to 1 and not greater than 2, and still more preferably greater than or equal to 1 and not greater than 1.5 (3/2).
- the reflectance in a visible region (in which the wavelength is greater than or equal to 400 nanometers (nm) and not greater than 800 nm, or is greater than or equal to 400 nm and not greater than 780 nm) is likely to increase, which makes it difficult to design an optical multilayer film for preventing reflection of light in the visible region.
- the quotient is greater than or equal to 1 and the physical thickness of the second layer is less than the physical thickness of the fourth layer, it is easy to increase the transmittance in the visible region, whereby sufficient antireflective performance can be provided.
- the physical thickness of the fourth layer exceeds four times the physical thickness of the second layer.
- a stress in the second layer and a stress in the fourth layer, which occur during heating are not well balanced, and one of the stresses becomes excessively greater than the other stress, whereby an excess force is applied to the optical multilayer film and the base during heating.
- Such excess force causes distortion or crack, and heat resistance becomes relatively insufficient.
- the stress in the second layer and the stress in the fourth layer, which occur during heating are well balanced, whereby an excess force is prevented from being applied to the optical multilayer film and the base during heating.
- distortion and crack are prevented, and sufficient heat resistance performance can be provided.
- the quotient is preferably not greater than 3, more preferably not greater than 2, and still more preferably not greater than 1.5.
- the optical multilayer film is preferably formed by a vacuum deposition method or a sputtering method.
- another kind of film such as a hard coating film or an antifouling film (water repellent film) may be additionally provided between the optical multilayer film and the base and/or on the surface of the optical multilayer film.
- the kind of the film to be additionally provided may be different between both the surfaces, or whether or not the film is provided may be determined for each surface.
- the hard coating film is advantageously formed by hard coating solution being uniformly applied to the surface of the base.
- an organosiloxane resin containing inorganic oxide particles can be preferably used.
- An organosiloxane resin obtained by hydrolyzing and condensing an alkoxysilane is preferred as the organosiloxane resin.
- specific examples of the organosiloxane resin include ⁇ -glycidoxypropyltrimethoxysilane, ⁇ -glycidoxypropyltriethoxysilane, methyl trimethoxysilane, ethyl silicate, and a combination thereof.
- the hydrolysis condensates of the alkoxysilanes are manufactured by hydrolyzing the alkoxysilane compounds or a combination thereof by an acidic aqueous solution such as hydrochloric acid.
- the inorganic oxide particles specifically, a sol of zinc oxide, silicon dioxide (silica particulates), aluminum oxide, titanium oxide (titania particulates), zirconium oxide (zirconia particulates), tin oxide, beryllium oxide, antimony oxide, tungsten oxide, or cerium oxide, or mixed crystals of two or more of the sols, can be used.
- the diameter of the inorganic oxide particle is preferably greater than or equal to 1 nm and not greater than 100 nm, and more preferably greater than or equal to 1 nm and not greater than 50 nm in order to ensure transparency of the hard coating film.
- an amount (concentration) of the inorganic oxide particles to be blended is preferably greater than or equal to 40% by weight of all the components of the hard coating film and not greater than 60% by weight thereof in order to ensure appropriate levels of hardness and toughness of the hard coating film.
- the hard coating solution may contain an acetylacetone metal salt, an ethylenediaminetetraacetic acid metal salt, and/or the like, as a curing catalyst.
- the hard coating solution may contain a surfactant, a colorant, a solvent, or the like, as necessary for, for example, ensuring adhesion to the base, facilitating formation, and coloring with a desired (semi)transparent color.
- the physical film thickness of the hard coating film is preferably greater than or equal to 0.5 ⁇ m (micrometer) and not greater than 4.0 ⁇ m.
- a sufficient hardness is obtained and a possibility of occurrence of physical problems is not high.
- the film thickness is less than the lower limit, a sufficient hardness is not obtained, and when the thickness is more than the upper limit, the possibility of occurrence of the physical problems such as generation of cracks or fragility is significantly increased.
- a primer layer may be additionally provided between the hard coating film and the base surface.
- a material of the primer layer include a polyurethane-based resin, an acrylic resin, a methacrylic resin, an organosilicon resin, and a combination thereof.
- the optical multilayer film of the optical product has the five-layer structure in which the low refractive index layers and the high refractive index layers are alternately layered.
- the low refractive index layers are formed by using SiO 2
- the high refractive index layers are formed by using ZrO 2 . Therefore, the optical multilayer film has a simple film structure, and is easily formed at low costs.
- the quotient obtained by dividing the physical thickness of the fourth layer by the physical thickness of the second layer is greater than or equal to 1 and not greater than 4, preferably greater than or equal to 1 and not greater than 3, more preferably greater than or equal to 1 and not greater than 2, and still more preferably greater than or equal to 1 and not greater than 1.5 (3/2). Therefore, it is possible to provide sufficient heat resistance while ensuring antireflective properties in a visible region (in which light has, for example, a wavelength greater than or equal to 400 nm and not greater than 800 nm, a wavelength greater than or equal to 450 nm and not greater than 800 nm, a wavelength greater than or equal to 450 nm and not greater than 750 nm, or the like).
- the base is a spectacle lens base
- the optical product is a spectacle lens.
- spectacles that are excellent in heat resistance while preventing reflection of light in the visible region can be produced at relatively low costs by using the spectacle lens.
- a plurality of spectacle lens bases of the same type were prepared, and intermediate films and optical multilayer films were formed on both surfaces of each spectacle lens base such that the kinds of these films are different among the spectacle lens bases, to produce the spectacle lenses according to Examples 1 to 5 and Comparative Examples 1 to 6.
- the spectacle lens base was a spherical lens base made of a thiourethane-based resin and having the power of S-2.00, and the refractive index was 1.60, and the Abbe number was 41, and a circular lens having a standard size as a spectacle lens was obtained.
- the intermediate film was implemented as a hard coating film formed by application of hard coating solution.
- the hard coating solution was produced as follows.
- This hard coat solution was applied to each surface of the spectacle lens base as follows.
- the hard coating solution was uniformly applied by a spin coating method, and was left as it was in an environment of 120° C. for 1.5 hours, whereby the hard coating solution was heat-cured.
- the physical film thickness was 2.5 ⁇ m.
- the film structure was the same on both the surfaces, and each of the optical multilayer films had a five-layer structure in which the low refractive index layers and the high refractive index layers were alternately deposited.
- the film thicknesses of at least one of the low refractive index layers and the high refractive index layers are different for each of Examples 1 to 5 and Comparative Examples.
- Examples 1 to 5 and Comparative Examples 1 to 6 have the same refractive index of SiO 2 , and the same refractive index of ZrO 2 .
- Each of the optical multilayer films according to Examples 1 to 5 and Comparative Examples was formed by a vacuum deposition method.
- the odd-numbered layers were the low refractive index layers, and were formed of silicon dioxide.
- the even-numbered layers were the high refractive index layers, and were formed of zircon dioxide.
- Example 1 a quotient obtained by dividing the physical thickness of the fourth layer by the physical thickness of the second layer is about 1.09 which is almost 1. The quotient being almost 1 can be translated into the ratio of the physical thickness of the fourth layer to the physical thickness of the second layer being about 1:1, as shown in “ZrO 2 physical thickness ratio between 2nd layer and 4th layer” column in [Table 1].
- Example 2 the quotient is about 1.30, and the ratio is about 2:3. In Example 3, the quotient is 2.00, and the ratio is 1:2. Further, in Example 4, the quotient is about 2.98, and the ratio is about 1:3. Furthermore, in Example 5, the quotient is about 3.98, and the ratio is about 1:4.
- Comparative Example 1 the quotient is about 0.67, and the ratio is about 3:2.
- the quotient is 0.50, and the ratio is 2:1.
- the quotient is 0.66, and the ratio is about 3:2.
- the quotient is about 0.33, and the ratio is about 3:1.
- the quotient is 0.20, and the ratio is 5:1.
- Example 1 Example 2
- Example 3 Example 4
- Example 5 Example 6 ZrO 2 physical thickness ratio between 2nd layer and 4th layer Refractive 1:1 2:3 1:2 1:3 1:4 1:5
- Layer Material index Physical thickness [nm] 1st layer SiO 2 1.4776 29.01 44.05 78.20 78.00 78.00 73.61
- 2nd layer ZrO 2 2.0939 43.00 42.30 30.64 28.00 24.00 20.78 3rd layer SiO 2 1.4776 24.95 22.71 23.83 16.83 17.60 20.75
- 4th layer ZrO 2 2.0939 47.00 55.00 61.28 83.50 95.45 101.47 5th layer SiO 2 1.4776 98.92 98.00 98.50 89.44 84.73 83.08
- Example 1 Example 2
- Example 3 Example 4
- Example 5 ZrO 2 physical thickness ratio between 2nd layer and 4th layer Refractive 3:2 2:1 3:2 3:1 5:1
- Layer Material index Physical thickness [nm] 1st layer SiO 2 1.4776 22.38 35.00 22.00 23.06 18.67 2nd layer ZrO 2 2.0939 30.00 30.00 50.00 50.00 50.00 3rd layer SiO 2 1.4776 47.00 76.72 34.07 43.00 28.85 4th layer ZrO 2 2.0939 20.00 15.00 33.00 16.50 10.00 5th layer SiO 2 1.4776 98.77 132.24 119.95 115.26 99.31
- FIG. 1 shows the spectral reflectance distributions in the visible region according to Examples 1 to 5 and Comparative Example 6, and FIG. 2 shows the spectral reflectance distributions in the visible region according to Comparative Examples 1 to 5.
- each of Examples 1 to 5 and Comparative Example 6 the maximum transmittance in the visible region (in which the wavelength is greater than or equal to 420 nm and not greater than 720 nm) is not greater than 3%. More specifically, the transmittance of 2.2% at the wavelength of 518 nm in Example 1 is the maximum transmittance. Therefore, it is found that each of Examples 1 to 5 and Comparative Example 6 has antireflective performance in the visible region.
- Examples 1 to 5 and Comparative Example 6 were examined for heat resistance by a heat resistance test and an accelerated heat resistance test. Comparative Examples 1 to 5 were not examined for heat resistance because the antireflective properties thereof were insufficient.
- Example 2 Example 3 ZrO 2 physical thickness ratio between 2nd layer and 4th layer 1:1 2:3 1:2 Result of heat 60° C. 30 min No problem 30 min No problem 30 min No problem resistance test 70° C. 30 min No problem 30 min No problem 30 min No problem 80° C. 30 min No problem 30 min No problem 30 min No problem 90° C. 30 min No problem 30 min No problem 30 min No problem 100° C. 30 min No problem 30 min No problem 30 min No problem 110° C. 30 min No problem 30 min No problem 30 min No problem 30 min No problem 120° C. 30 min No problem 20 min Crack 10 min Crack 130° C. 5 min Crack — — Example 4 Example 5 Com.
- Example 6 ZrO 2 physical thickness ratio between 2nd layer and 4th layer 1:3 1:4 1:5 Result of heat 60° C. 30 min No problem 30 min No problem 30 min No problem resistance test 70° C. 30 min No problem 30 min No problem 30 min No problem 80° C. 30 min No problem 30 min No problem 30 min No problem 30 min No problem 90° C. 30 min No problem 30 min No problem 30 min No problem 100° C. 30 min No problem 30 min No problem 10 min Crack 110° C. 30 min Crack 30 min Crack — 120° C. — — — 130° C. — — —
- Example 5 having the quotient of about 3.98, and the ratio of about 1:4
- Example 4 having the quotient of about 2.98, and the ratio of about 1:3
- Example 3 having the quotient of 2.00, and the ratio of 1:2
- Example 2 having the quotient of about 1.30, and the ratio of about 2:3
- Example 1 having the quotient of about 1.09, and the ratio of about 1:1
- crack did not occur until 5 minutes elapsed at 130° C.
- Example 5 has the higher heat resistance, and Examples 4, 3, 2 and 1 have still higher resistances in this order.
- Example 4 shows the result of the accelerated heat resistance test.
- Example 1 Example 2
- Example 3 ZrO 2 physical thickness ratio between 2nd layer and 4th layer 1:1 2:3 1:2 Result of 60° C. 30 min No problem 30 min No problem 30 min No problem accelerated 70° C. 30 min No problem 30 min No problem 30 min No problem heat resistance 80° C. 30 min No problem 30 min No problem 30 min No problem test 90° C. 30 min Crack 10 min Crack 5 min Crack 100° C. — — — 110° C. — — — 120° C. — — — 130° C. — — — Example 4
- Example 5 Example 5 Com.
- Example 6 ZrO 2 physical thickness ratio between 2nd layer and 4th layer 1:3 1:4 1:5 Result of 60° C.
- Example 5 In contrast, in Example 5 (having the quotient of about 3.98), the sample was loaded in the oven at 60° C., and crack did not occur until 15 minutes elapsed at 80° C. Also in Example 4 (having the quotient of about 2.98), crack did not occur until 10 minutes elapsed at 80° C. Further, in Example 3 (having the quotient of 2.00), crack did not occur until 5 minutes elapsed at 90° C. Furthermore, in Example 2 (having the quotient of about 1.30), crack did not occur until 10 minutes elapsed at 90° C. Moreover, in Example 1 (having the quotient of about 1.09), crack did not occur until 30 minutes elapsed at 90° C.
- Example 4 has the equivalent heat resistance (durability of heat resistance performance) after elapse of a long period of time
- Example 5 has a little higher heat resistance after elapse of a long period of time
- Examples 3, 2 and 1, in this order have still higher heat resistances after elapse of a long period of time.
- Example 5 to Example 1 seen in order, as the quotient approaches closer to 1 (the ratio of the physical thickness of the fourth layer to that of the second layer approaches closer to 1:1), the heat resistance is more improved while the antireflective function is maintained.
- Spectacles that allow achievement of both antireflective properties to light in a visible region and heat resistance can be produced by using the spectacle lens according to Examples 1 to 5. Further, optical products, such as films for windows (buildings, vehicles, and the like), camera lens filters, and the like, having the same characteristics as those of Examples 1 to 5, can be produced.
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Abstract
It is an object to provide an optical product and the like which have antireflective performance, require less number of types of materials for film formation, have a simple film structure which makes film formation easy and reduces costs, and have sufficient heat resistance. In the optical product, an optical multilayer film having a five-layer structure in which SiO2 and ZrO2 are alternately layered is provided on one or both of surfaces of a base. With a layer closest to the base being a first layer, a quotient obtained by dividing a physical thickness of a fourth layer that is ZrO2 by a physical thickness of a second layer that is ZrO2 is greater than or equal to 1 and not greater than 4.
Description
This application is a Continuation of International Application No. PCT/JP2015/052347, filed on Jan. 28, 2015, which claims the benefit of Japanese Patent Application Number 2014-025752 filed on Feb. 13, 2014, the disclosures of which are incorporated by reference herein in their entireties.
The present invention relates to optical products such as spectacle lenses (including sunglass lenses), and spectacles (including sunglasses) that use the spectacle lenses.
As spectacle lenses with improved heat resistance, the products disclosed in Japanese Laid-Open Patent Publication No. 2006-276123 (JP 2006-276123 A) and Japanese Laid-Open Patent Publication No. 2005-234188 (JP 2005-234188 A) are known.
The spectacle lens disclosed in JP 2006-276123 A includes antireflection films on an object-side surface and an eyeball-side surface of a lens base. The antireflection film contains at least one of silicon oxide, titanium oxide, lanthanum titanate, tantalum oxide, and niobium oxide, whereby the object-side antireflection film is caused to have a compressive stress, and the eyeball-side antireflection film is caused to have a compressive stress less than that of the object-side antireflection film or to have a tensile stress.
In the product disclosed in JP 2005-234188 A, an antireflection film is formed of a combination of ternary materials, i.e., silicon oxide, a sintered mixture of titanium oxide, lanthanum oxide, and titanium, and a material having a refractive index higher than that of silicon oxide, thereby providing heat resistance performance.
In the product disclosed in JP 2006-276123 A, the antireflection film should be formed so that silicon oxide or the like has a predetermined compressive stress or tensile stress. Therefore, the film structure for providing sufficient heat resistance while having antireflective performance is complicated, resulting in high costs.
Meanwhile, in the product disclosed in JP 2005-234188 A, since the antireflection film is formed of the combination of the ternary materials as described above, difficulty in controlling film design and film formation is increased, resulting in high costs for film formation.
Therefore, the present invention has an object to provide an optical product, a spectacle lens, and spectacles, which have antireflective performance, require less number of types of materials for film formation, have a simple film structure which makes film formation easy and reduces costs, and have sufficient heat resistance.
In order to attain the aforementioned object, a first aspect of the invention provides an optical product in which (A) an optical multilayer film having a five-layer structure in which SiO2 and ZrO2 are alternately layered is provided on one or both of surfaces of a base, and (B-1) with a layer closest to the base being a first layer, a quotient obtained by dividing a physical thickness of a fourth layer that is ZrO2 by a physical thickness of a second layer that is ZrO2 is greater than or equal to 1 and not greater than 4.
In order to attain the aforementioned object, a second aspect of the invention provides an optical product in which (A) an optical multilayer film having a five-layer structure in which SiO2 and ZrO2 are alternately layered is provided on one or both of surfaces of a base, and (B-2) with a layer closest to the base being a first layer, a quotient obtained by dividing a physical thickness of a fourth layer that is ZrO2 by a physical thickness of a second layer that is ZrO2 is greater than or equal to 1 and not greater than 3.
In order to attain the aforementioned object, a third aspect of the invention provides an optical product in which (A) an optical multilayer film having a five-layer structure in which SiO2 and ZrO2 are alternately layered is provided on one or both of surfaces of a base, and (B-3) with a layer closest to the base being a first layer, a quotient obtained by dividing a physical thickness of a fourth layer that is ZrO2 by a physical thickness of a second layer that is ZrO2 is greater than or equal to 1 and not greater than 2.
In order to attain the aforementioned object, a fourth aspect of the invention provides an optical product in which (A) an optical multilayer film having a five-layer structure in which SiO2 and ZrO2 are alternately layered is provided on one or both of surfaces of a base, and (B-4) with a layer closest to the base being a first layer, a quotient obtained by dividing a physical thickness of a fourth layer that is ZrO2 by a physical thickness of a second layer that is ZrO2 is greater than or equal to 1 and not greater than 1.5.
A fifth aspect of the invention provides a spectacle lens using the optical product according to the above-described invention.
A sixth aspect of the invention provides spectacles using the spectacle lens according to the above-described invention.
The present invention exerts an effect of providing an optical product, a spectacle lens, and spectacles which require less number of types of materials for film formation, have a simple film structure which makes film formation easy and reduces costs, and have both antireflective properties and heat resistance.
An exemplary embodiment of the present invention will be described below with reference to the drawings as appropriate. The present invention is not limited to the exemplary embodiment described below.
A spectacle lens according to the present invention has an optical multilayer film on one surface or both surfaces of a base.
In the present invention, the base may be made of any material, and is preferably translucent. Examples of the material (base material) of the base include a polyurethane resin, a thiourethane resin, an episulfide resin, a polycarbonate resin, a polyester resin, an acrylic resin, a polyether sulfone resin, a poly(4-methylpentene-1) resin, and a diethylene glycol bis(allyl carbonate) resin. Further, examples of the material include, as a preferable material (for, in particular, a spectacle lens) having a high refractive index, an episulfide resin obtained by addition-polymerization of an episulfide group with polythiol and/or a sulfur-containing polyol.
Further, in the present invention, the optical multilayer film satisfies the following conditions. When the optical multilayer films are formed on both the surfaces, both of the films preferably satisfy the following conditions, and more preferably have the same layered structure.
Firstly, the optical multilayer film has a five-layer structure in which low refractive index layers and high refractive index layers are alternately layered. When a nearest layer to the base (the layer closest to the base) is a first layer, odd-numbered layers are the low refractive index layers and even-numbered layers are high refractive index layers.
Next, the low refractive index layers are formed by using silica (silicon dioxide, SiO2), and the high refractive index layers are formed by using zirconia (zirconium dioxide, ZrO2).
A quotient obtained by dividing the physical thickness of the fourth layer (high refractive index layer) by the physical thickness of the second layer (high refractive index layer) is greater than or equal to 1 and not greater than 4. This quotient (solution of division) is preferably greater than or equal to 1 and not greater than 3, more preferably greater than or equal to 1 and not greater than 2, and still more preferably greater than or equal to 1 and not greater than 1.5 (3/2).
When the quotient is less than 1 and the physical thickness of the second layer is greater than the physical thickness of the fourth layer, the reflectance in a visible region (in which the wavelength is greater than or equal to 400 nanometers (nm) and not greater than 800 nm, or is greater than or equal to 400 nm and not greater than 780 nm) is likely to increase, which makes it difficult to design an optical multilayer film for preventing reflection of light in the visible region. In contrast, in the present invention, since the quotient is greater than or equal to 1 and the physical thickness of the second layer is less than the physical thickness of the fourth layer, it is easy to increase the transmittance in the visible region, whereby sufficient antireflective performance can be provided.
On the other hand, when the quotient is greater than 4, the physical thickness of the fourth layer exceeds four times the physical thickness of the second layer. In this case, a stress in the second layer and a stress in the fourth layer, which occur during heating, are not well balanced, and one of the stresses becomes excessively greater than the other stress, whereby an excess force is applied to the optical multilayer film and the base during heating. Such excess force causes distortion or crack, and heat resistance becomes relatively insufficient. In contrast, in the present invention, since the quotient is not greater than 4, the stress in the second layer and the stress in the fourth layer, which occur during heating, are well balanced, whereby an excess force is prevented from being applied to the optical multilayer film and the base during heating. Thus, distortion and crack are prevented, and sufficient heat resistance performance can be provided. Further, as the quotient approaches closer to 1, the stresses are better balanced, and the heat resistance is more improved. The quotient is preferably not greater than 3, more preferably not greater than 2, and still more preferably not greater than 1.5.
The optical multilayer film is preferably formed by a vacuum deposition method or a sputtering method.
In the present invention, another kind of film such as a hard coating film or an antifouling film (water repellent film) may be additionally provided between the optical multilayer film and the base and/or on the surface of the optical multilayer film. When the optical multilayer films are formed on both the surfaces, the kind of the film to be additionally provided may be different between both the surfaces, or whether or not the film is provided may be determined for each surface.
When a hard coating film is used as the film to be provided between the optical multilayer film and the base, the hard coating film is advantageously formed by hard coating solution being uniformly applied to the surface of the base.
Further, for the hard coating film, an organosiloxane resin containing inorganic oxide particles can be preferably used. An organosiloxane resin obtained by hydrolyzing and condensing an alkoxysilane is preferred as the organosiloxane resin. Further, specific examples of the organosiloxane resin include γ-glycidoxypropyltrimethoxysilane, γ-glycidoxypropyltriethoxysilane, methyl trimethoxysilane, ethyl silicate, and a combination thereof. The hydrolysis condensates of the alkoxysilanes are manufactured by hydrolyzing the alkoxysilane compounds or a combination thereof by an acidic aqueous solution such as hydrochloric acid.
Meanwhile, as an exemplary material of the inorganic oxide particles, specifically, a sol of zinc oxide, silicon dioxide (silica particulates), aluminum oxide, titanium oxide (titania particulates), zirconium oxide (zirconia particulates), tin oxide, beryllium oxide, antimony oxide, tungsten oxide, or cerium oxide, or mixed crystals of two or more of the sols, can be used. The diameter of the inorganic oxide particle is preferably greater than or equal to 1 nm and not greater than 100 nm, and more preferably greater than or equal to 1 nm and not greater than 50 nm in order to ensure transparency of the hard coating film. Further, an amount (concentration) of the inorganic oxide particles to be blended is preferably greater than or equal to 40% by weight of all the components of the hard coating film and not greater than 60% by weight thereof in order to ensure appropriate levels of hardness and toughness of the hard coating film. In addition, the hard coating solution may contain an acetylacetone metal salt, an ethylenediaminetetraacetic acid metal salt, and/or the like, as a curing catalyst. Further, the hard coating solution may contain a surfactant, a colorant, a solvent, or the like, as necessary for, for example, ensuring adhesion to the base, facilitating formation, and coloring with a desired (semi)transparent color.
The physical film thickness of the hard coating film is preferably greater than or equal to 0.5 μm (micrometer) and not greater than 4.0 μm. When the film thickness is in the range, a sufficient hardness is obtained and a possibility of occurrence of physical problems is not high. In other words, when the film thickness is less than the lower limit, a sufficient hardness is not obtained, and when the thickness is more than the upper limit, the possibility of occurrence of the physical problems such as generation of cracks or fragility is significantly increased.
Further, a primer layer may be additionally provided between the hard coating film and the base surface. Examples of a material of the primer layer include a polyurethane-based resin, an acrylic resin, a methacrylic resin, an organosilicon resin, and a combination thereof.
The optical multilayer film of the optical product has the five-layer structure in which the low refractive index layers and the high refractive index layers are alternately layered. The low refractive index layers are formed by using SiO2, and the high refractive index layers are formed by using ZrO2. Therefore, the optical multilayer film has a simple film structure, and is easily formed at low costs.
In the above-described optical product, the quotient obtained by dividing the physical thickness of the fourth layer by the physical thickness of the second layer is greater than or equal to 1 and not greater than 4, preferably greater than or equal to 1 and not greater than 3, more preferably greater than or equal to 1 and not greater than 2, and still more preferably greater than or equal to 1 and not greater than 1.5 (3/2). Therefore, it is possible to provide sufficient heat resistance while ensuring antireflective properties in a visible region (in which light has, for example, a wavelength greater than or equal to 400 nm and not greater than 800 nm, a wavelength greater than or equal to 450 nm and not greater than 800 nm, a wavelength greater than or equal to 450 nm and not greater than 750 nm, or the like).
In the above-described optical product, preferably, the base is a spectacle lens base, and the optical product is a spectacle lens. Further, spectacles that are excellent in heat resistance while preventing reflection of light in the visible region can be produced at relatively low costs by using the spectacle lens.
Next, Examples of the present invention according to the above-described embodiment and Comparative Examples 1 to 6 that do not belong to the present invention, will be described. The embodiment of the present invention is not limited to the examples described below.
A plurality of spectacle lens bases of the same type were prepared, and intermediate films and optical multilayer films were formed on both surfaces of each spectacle lens base such that the kinds of these films are different among the spectacle lens bases, to produce the spectacle lenses according to Examples 1 to 5 and Comparative Examples 1 to 6.
The spectacle lens base was a spherical lens base made of a thiourethane-based resin and having the power of S-2.00, and the refractive index was 1.60, and the Abbe number was 41, and a circular lens having a standard size as a spectacle lens was obtained.
Further, the intermediate film was implemented as a hard coating film formed by application of hard coating solution.
The hard coating solution was produced as follows.
Firstly, 206 g (grams) of methanol, 300 g of a methanol-dispersed titania sol (made by JGC Catalysts and Chemicals Ltd., solid content: 30%), 60 g of γ-glycidoxypropyltrimethoxysilane, 30 g of γ-glycidoxypropylmethyldiethoxysilane, and 60 g of tetraethoxysilane were dropped into a container, and 0.01 N (normality) of a hydrochloric acid aqueous solution was dropped into the mixed solution. The resultant mixed solution was stirred and hydrolyzed.
Then, 0.5 g of a flow regulating agent and 1.0 g of a catalyst were added, and the resultant mixed solution was stirred at room temperature for 3 hours.
This hard coat solution was applied to each surface of the spectacle lens base as follows.
That is, the hard coating solution was uniformly applied by a spin coating method, and was left as it was in an environment of 120° C. for 1.5 hours, whereby the hard coating solution was heat-cured.
In any of the hard coating films having been thus formed, the physical film thickness was 2.5 μm.
Further, for the optical multilayer films, in the same spectacle lens base, the film structure was the same on both the surfaces, and each of the optical multilayer films had a five-layer structure in which the low refractive index layers and the high refractive index layers were alternately deposited. The film thicknesses of at least one of the low refractive index layers and the high refractive index layers are different for each of Examples 1 to 5 and Comparative Examples. Examples 1 to 5 and Comparative Examples 1 to 6 have the same refractive index of SiO2, and the same refractive index of ZrO2.
Each of the optical multilayer films according to Examples 1 to 5 and Comparative Examples was formed by a vacuum deposition method.
The odd-numbered layers (the first, the third, the fifth layers) were the low refractive index layers, and were formed of silicon dioxide. The even-numbered layers (the second, the fourth layers) were the high refractive index layers, and were formed of zircon dioxide.
In the following [Table 1], the refractive index, the film thickness, and the like of each layer in the optical multilayer film of each of Examples 1 to 5 and Comparative Example 6 are shown. In [Table 2], the refractive index, the film thickness, and the like of each layer in the optical multilayer film in each of Comparative Examples 1 to 5 are shown.
In Example 1, a quotient obtained by dividing the physical thickness of the fourth layer by the physical thickness of the second layer is about 1.09 which is almost 1. The quotient being almost 1 can be translated into the ratio of the physical thickness of the fourth layer to the physical thickness of the second layer being about 1:1, as shown in “ZrO2 physical thickness ratio between 2nd layer and 4th layer” column in [Table 1].
Likewise, in Example 2, the quotient is about 1.30, and the ratio is about 2:3. In Example 3, the quotient is 2.00, and the ratio is 1:2. Further, in Example 4, the quotient is about 2.98, and the ratio is about 1:3. Furthermore, in Example 5, the quotient is about 3.98, and the ratio is about 1:4.
On the other hand, as shown in [Table 2], in Comparative Example 1, the quotient is about 0.67, and the ratio is about 3:2. In Comparative Example 2, the quotient is 0.50, and the ratio is 2:1. Further, in Comparative Example 3, the quotient is 0.66, and the ratio is about 3:2. Furthermore, in Comparative Example 4, the quotient is about 0.33, and the ratio is about 3:1. Moreover, in Comparative Example 5, the quotient is 0.20, and the ratio is 5:1.
As shown in [Table 1], in Comparative Example 6, the quotient is about 4.88, and the ratio is about 1:5.
TABLE 1 | |||||||
Com. | |||||||
Example 1 | Example 2 | Example 3 | Example 4 | Example 5 | Example 6 |
ZrO2 physical thickness ratio between 2nd layer and 4th layer |
Refractive | 1:1 | 2:3 | 1:2 | 1:3 | 1:4 | 1:5 |
Layer | Material | index | Physical thickness [nm] |
1st layer | SiO2 | 1.4776 | 29.01 | 44.05 | 78.20 | 78.00 | 78.00 | 73.61 |
2nd layer | ZrO2 | 2.0939 | 43.00 | 42.30 | 30.64 | 28.00 | 24.00 | 20.78 |
3rd layer | SiO2 | 1.4776 | 24.95 | 22.71 | 23.83 | 16.83 | 17.60 | 20.75 |
4th layer | ZrO2 | 2.0939 | 47.00 | 55.00 | 61.28 | 83.50 | 95.45 | 101.47 |
5th layer | SiO2 | 1.4776 | 98.92 | 98.00 | 98.50 | 89.44 | 84.73 | 83.08 |
TABLE 2 | ||||||
Com. | Com. | Com. | Com. | Com. | ||
Example 1 | Example 2 | Example 3 | Example 4 | Example 5 |
ZrO2 physical thickness ratio between 2nd layer and 4th layer |
Refractive | 3:2 | 2:1 | 3:2 | 3:1 | 5:1 |
Layer | Material | index | Physical thickness [nm] |
1st layer | SiO2 | 1.4776 | 22.38 | 35.00 | 22.00 | 23.06 | 18.67 |
2nd layer | ZrO2 | 2.0939 | 30.00 | 30.00 | 50.00 | 50.00 | 50.00 |
3rd layer | SiO2 | 1.4776 | 47.00 | 76.72 | 34.07 | 43.00 | 28.85 |
4th layer | ZrO2 | 2.0939 | 20.00 | 15.00 | 33.00 | 16.50 | 10.00 |
5th layer | SiO2 | 1.4776 | 98.77 | 132.24 | 119.95 | 115.26 | 99.31 |
In Examples 1 to 5 and Comparative Examples 1 to 6, spectral reflectance distributions in the visible region were measured by using a measuring machine. FIG. 1 shows the spectral reflectance distributions in the visible region according to Examples 1 to 5 and Comparative Example 6, and FIG. 2 shows the spectral reflectance distributions in the visible region according to Comparative Examples 1 to 5.
According to the reflectance distributions shown in FIG. 1 , in each of Examples 1 to 5 and Comparative Example 6, the maximum transmittance in the visible region (in which the wavelength is greater than or equal to 420 nm and not greater than 720 nm) is not greater than 3%. More specifically, the transmittance of 2.2% at the wavelength of 518 nm in Example 1 is the maximum transmittance. Therefore, it is found that each of Examples 1 to 5 and Comparative Example 6 has antireflective performance in the visible region.
In contrast, according to the reflectance distributions shown in FIG. 2 , in Comparative Examples 1 to 5, the maximum transmittance in the visible region is about 5 to 15%, and therefore it is hard to say that Comparative Examples 1 to 5 have sufficient antireflective performance in the visible region.
That is, when the quotient obtained by dividing the physical thickness of the fourth layer by the physical thickness of the second layer is greater than or equal to 1 as in Examples 1 to 5 and Comparative Example 6, a sufficient antireflective function in the visible region can be achieved. On the other hand, when the quotient obtained by dividing the physical thickness of the fourth layer by the physical thickness of the second layer is less than 1 as in Comparative Examples 1 to 5, it is difficult to provide a sufficient antireflective function in the visible region.
Examples 1 to 5 and Comparative Example 6 were examined for heat resistance by a heat resistance test and an accelerated heat resistance test. Comparative Examples 1 to 5 were not examined for heat resistance because the antireflective properties thereof were insufficient.
Firstly, the heat resistance test will be described. Samples of Examples 1 to 5 and Comparative Example 6 were loaded in ovens which were set at temperatures indicated next to “Result of heat resistance test” in the following [Table 3]. Measurement of a loading time during which each sample was placed in the oven was started simultaneously with loading of the sample in the oven. The measurement of the loading time was suspended each time the loading time reached 5 minutes, and the sample was taken out of the oven to visually recognize whether or not crack occurred. At a point in time when crack occurred, the heat resistance test for each of Examples 1 to 5 and Comparative Example 6 was ended. On the other hand, when crack did not occur, each sample was returned to the oven and measurement of the loading time was resumed. When the loading time for each temperature reached 30 minutes in total, loading at that temperature was ended, and the sample was loaded in the oven set at a one-stage (10° C.) higher temperature, and then measurement of the loading time was started from the beginning.
The result of the heat resistance test is shown in [Table 3].
TABLE 3 | ||||
Example 1 | Example 2 | Example 3 |
ZrO2 physical thickness ratio between 2nd layer and 4th layer |
1:1 | 2:3 | 1:2 | ||
Result of heat | 60° C. | 30 min | No |
30 min | No |
30 min | No problem | |
resistance test | 70° C. | 30 min | No |
30 min | No |
30 min | No problem | |
80° C. | 30 min | No |
30 min | No |
30 min | No problem | ||
90° C. | 30 min | No |
30 min | No |
30 min | No problem | ||
100° C. | 30 min | No |
30 min | No |
30 min | No problem | ||
110° C. | 30 min | No |
30 min | No |
30 min | No problem | ||
120° C. | 30 min | No |
20 | Crack | 10 min | Crack |
130° C. | 5 min | Crack | — | — | ||
Example 4 | Example 5 | Com. Example 6 |
ZrO2 physical thickness ratio between 2nd layer and 4th layer |
1:3 | 1:4 | 1:5 | ||
Result of heat | 60° C. | 30 min | No |
30 min | No |
30 min | No problem |
resistance test | 70° C. | 30 min | No |
30 min | No |
30 min | No problem |
80° C. | 30 min | No |
30 min | No |
30 min | No problem | |
90° C. | 30 min | No |
30 min | No |
30 min | No problem | |
100° C. | 30 min | No |
30 min | No |
10 min | Crack |
110° C. | 30 | Crack | 30 min | Crack | — |
120° C. | — | — | — | ||
130° C. | — | — | — | ||
According to [Table 3], in Comparative Example 6 (having the quotient of about 4.88, and the ratio of about 1:5), the sample was loaded in the oven at 60° C., and withstood until 5 minutes elapsed at 100° C., but crack occurred after 10 minutes elapsed at 100° C.
In contrast, in Example 5 (having the quotient of about 3.98, and the ratio of about 1:4), the sample was placed in the oven at 60° C., and crack did not occur until 30 minutes elapsed at 110° C. Also in Example 4 (having the quotient of about 2.98, and the ratio of about 1:3), crack did not occur until 30 minutes elapsed at 110° C. Further, in Example 3 (having the quotient of 2.00, and the ratio of 1:2), crack did not occur until 10 minutes elapsed at 120° C. Furthermore, in Example 2 (having the quotient of about 1.30, and the ratio of about 2:3), crack did not occur until 20 minutes elapsed at 120° C. Moreover, in Example 1 (having the quotient of about 1.09, and the ratio of about 1:1), crack did not occur until 5 minutes elapsed at 130° C.
Accordingly, it is found that, as compared to the Comparative Example, Example 5 has the higher heat resistance, and Examples 4, 3, 2 and 1 have still higher resistances in this order.
Next, the accelerated heat resistance test will be described. Samples of Examples 1 to 5 and Comparative Examples were loaded in a constant temperature constant humidity tester (LHU-113 manufactured by ESPEC Corp.) kept at a temperature of 60° C. and a humidity of 95%, and were left continuously for 3 days (72 hours). Thereafter, the samples were taken out of the constant temperature constant humidity tester, and were subjected to the same procedure as the heat resistance test by using ovens set at temperatures indicated next to “Result of accelerated heat resistance test” in the following [Table 4]. Loading of the samples in the constant temperature constant humidity tester provides, in a short time, the same states of the samples as those obtained after a long period of time.
TABLE 4 |
shows the result of the accelerated heat resistance test. |
Example 1 | Example 2 | Example 3 |
ZrO2 physical thickness ratio between 2nd layer and 4th layer |
1:1 | 2:3 | 1:2 | ||
Result of | 60° C. | 30 min | No |
30 min | No |
30 min | No problem | ||
accelerated | 70° C. | 30 min | No |
30 min | No |
30 min | No problem | ||
heat resistance | 80° C. | 30 min | No |
30 min | No |
30 min | No problem | ||
test | 90° C. | 30 | Crack | 10 | Crack | 5 min | Crack |
100° C. | — | — | — | ||
110° C. | — | — | — | ||
120° C. | — | — | — | ||
130° C. | — | — | — | ||
Example 4 | Example 5 | Com. Example 6 |
ZrO2 physical thickness ratio between 2nd layer and 4th layer |
1:3 | 1:4 | 1:5 | ||
Result of | 60° C. | 30 min | No |
30 min | No |
30 min | No problem | ||
accelerated | 70° C. | 30 min | No |
30 min | No |
30 min | No problem | ||
heat resistance | 80° C. | 10 | Crack | 15 | Crack | 10 min | Crack |
test | 90° C. | — | — | — |
100° C. | — | — | — | |
110° C. | — | — | — | |
120° C. | — | — | — | |
130° C. | — | — | — | |
According to [Table 4], in Comparative Example 6 (having the quotient of about 4.88), the sample was loaded in the oven at 60° C., and withstood until 5 minutes elapsed at 80° C., but crack occurred after 10 minutes elapsed at 80° C.
In contrast, in Example 5 (having the quotient of about 3.98), the sample was loaded in the oven at 60° C., and crack did not occur until 15 minutes elapsed at 80° C. Also in Example 4 (having the quotient of about 2.98), crack did not occur until 10 minutes elapsed at 80° C. Further, in Example 3 (having the quotient of 2.00), crack did not occur until 5 minutes elapsed at 90° C. Furthermore, in Example 2 (having the quotient of about 1.30), crack did not occur until 10 minutes elapsed at 90° C. Moreover, in Example 1 (having the quotient of about 1.09), crack did not occur until 30 minutes elapsed at 90° C.
Accordingly, it is found that, as compared to Comparative Example, Example 4 has the equivalent heat resistance (durability of heat resistance performance) after elapse of a long period of time, Example 5 has a little higher heat resistance after elapse of a long period of time, and Examples 3, 2 and 1, in this order, have still higher heat resistances after elapse of a long period of time.
As in Examples 1 to 5, when the quotient obtained by dividing the physical thickness of the fourth layer in the optical multilayer film by the physical thickness of the second layer is not greater than 4, it is possible to achieve sufficient heat resistance while providing an antireflective function in the visible region, in the simple and easy-to-form optical multilayer film having the five-layer structure using SiO2 and ZrO2. When the quotient is less than 1 as in Comparative Examples 1 to 5, it is difficult to design the optical multilayer film for providing a sufficient antireflective function in the visible region.
As is understood from Example 5 to Example 1 seen in order, as the quotient approaches closer to 1 (the ratio of the physical thickness of the fourth layer to that of the second layer approaches closer to 1:1), the heat resistance is more improved while the antireflective function is maintained.
Spectacles that allow achievement of both antireflective properties to light in a visible region and heat resistance can be produced by using the spectacle lens according to Examples 1 to 5. Further, optical products, such as films for windows (buildings, vehicles, and the like), camera lens filters, and the like, having the same characteristics as those of Examples 1 to 5, can be produced.
It is explicitly stated that all features disclosed in the description and/or the claims are intended to be disclosed separately and independently from each other for the purpose of original disclosure as well as for the purpose of restricting the claimed invention independent of the composition of the features in the embodiments and/or the claims. It is explicitly stated that all value ranges or indications of groups of entities disclose every possible intermediate value or intermediate entity for the purpose of original disclosure as well as for the purpose of restricting the claimed invention, in particular as limits of value ranges.
Claims (3)
1. An optical product comprising:
a base; and
an optical multilayer film, which prevents reflection in a visible region, formed on both surfaces of the base, wherein the optical multilayer film comprises a five-layer structure in which SiO2 and ZrO2 are alternately layered;
wherein a layer of the multilayer film closest to the base is a first layer; and
wherein a quotient obtained by dividing a physical thickness of a fourth layer, that is ZrO2, by a physical thickness of a second layer, that is ZrO2, is in a range of 1 or more to 1.5 or less.
2. A spectacle lens comprising the optical product according to claim 1 .
3. Spectacles comprising the spectacle lens according to claim 2 .
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JP2014025752A JP2015152735A (en) | 2014-02-13 | 2014-02-13 | Optical product and spectacle lens, and spectacle |
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PCT/JP2015/052347 WO2015122278A1 (en) | 2014-02-13 | 2015-01-28 | Optical product, glasses lens and glasses |
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JP6473282B1 (en) * | 2017-09-29 | 2019-02-20 | ホヤ レンズ タイランド リミテッドHOYA Lens Thailand Ltd | Eyeglass lenses and eyeglasses |
AU2018334589B2 (en) * | 2017-09-29 | 2020-03-26 | Hoya Lens Thailand Ltd. | Spectacle lens and spectacles |
CN109143600A (en) * | 2018-09-04 | 2019-01-04 | 长春理工大学光电信息学院 | A kind of 3D eyeglass and preparation method thereof |
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